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Multi-Bessel Beams Generated by an Axicon and a Spatial Light Modulator for Drilling Applications

  • We report on an optical setup to generate multi-Bessel beam profiles combining a refractive axicon and a spatial light modulator. Based on their particular beam profile, Bessel beams offer advantageous properties for micro drilling processes and internal volume processing, especially for transparent materials. In addition, the laser power of industrial, ultrashort pulsed lasers has increased significantly over the last few years, offering the possibility for highly efficient processes using multi-spot profiles. Our optical concept combines the dynamic possibilities of beam splitting using a spatial light modulator with the benefits of Bessel beams, which facilitates multi-Bessel beam processing. Beside the simulation and experimental evaluation of the generated multi-Bessel beams, we exemplify the applicability of the developed module for the perforation of thin metal foils by micro drilling.

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Metadaten
Author:Christian Lutz, Simon Schwarz, Jan Marx, Cemal Esen, Ralf HellmannORCiD
URL:https://www.mdpi.com/2304-6732/10/4/413
DOI:https://doi.org/10.3390/photonics10040413
Parent Title (English):MDPI Photonics
Document Type:Article
Language:English
Year of Completion:2023
Release Date:2024/03/11
Tag:Axicon; Bessel beam; Material ablation; Optical System; Ultrashort pulsed laser
GND Keyword:Bessel-Bündel; Ultrakurzzeitlaser
Volume:2023
Issue:10/413
First Page:1
Last Page:9
Urheberrecht:1
Institutes:Fakultät Ingenieurwissenschaften / Labore / Angewandte Lasertechnik und Photonik (alp)
research focus :Materials / Innovative Material Processing
Reviewed:ja
Licence (German):Keine Lizenz - es gilt das deutsche Urheberrecht
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